Dogs' teeth (dens-canis) is the curious name applied to the European Erythronium because the bulbs bear a resemblance to the tooth of a canine. Above is an American cultivar Erythronium Pagoda. The bulbs of American species have a similar appearance but this doesn't seem to have figured in the naming the plant.
 I planted a dozen or so of Pagoda in the shady "woodland" part of the garden and very nice they are too. In the back of my mind was the memory of seeing a streamside meadow near Crater Lake, Oregon last year dotted with hundreds of Erythroniums. I think these were E. grandiflorum and Pagoda seems like a close relative when I compare it to the ones I saw that day: